I used the Cactus V4 and they were affordable and worked rather well. However, I am much more satisfied with the Yong Nuo RF-602 triggers. They run on the same frequency as Pocket Wizards and Cyber Syncs.

I also have the Yong Nuo RF-602 and they are great! I got them from eBay and they cost me £26.

I spent weeks reading reviews and user feedback on various websites such as Flickr etc and the conclusion was that the Yong Nuo RF-602 were cheaper yet worked better and were more reliable than the Cactus V4s.

I'm not a stobist expert but the Yong Nuo RF-602 are great, especially if you are on a small budget.